Oven Temperature & Gas Marks
Convert oven temperature heat indexes between Celsius, Fahrenheit, and official Gas Marks.
Explore Additional Utilities
Prism Power Converter
Convert ophthalmic prism power between prism diopters (PD) and degrees of deviation, with light bending estimations.
Drag suit resistance — added drag ↔ training load increase
Calculate the training resistance coefficient multiplier and added energetic training load of a drag suit.
Carbon Footprint Calculator
Convert between distance driven (km or miles) and greenhouse gas emissions (kg CO2) across various vehicle fuel types and efficiencies.
VO2 Max & Aerobic Capacity Estimator
Convert running race times or heart rates into VO2 Max estimates and aerobic fitness classifications.
Fabric Width Yardage Converter
Convert fabric yardage requirements between different standard widths like 44 inches and 60 inches.
Pipe Flow Rate Calculator
Calculate water flow rate, velocity, and capacity under gravity or pressurized nozzle flow.
Mohs Hardness & Scratch Resistance
Compare minerals, absolute hardness values, and scratch interactions using the classic 1-10 Mohs scale and Knoop indentation hardness.
Honey yield — hive strength ↔ kg per season estimate
Estimate seasonal honey surplus production based on hive workforce size and local floral nectar flow conditions.
Drug Concentration Converter
Convert pharmaceutical concentrations between % w/v, mg/mL, and mol/L using substance molecular weight presets.
Thread Weight Converter
Convert between different thread sizing standards including Tex, Denier, and Number English (Ne).
Drug & Supplement Dosage Converter
Convert supplement and drug dosing between milligrams (mg), micrograms (mcg), and International Units (IU) for vitamins A, C, D, and E.
Nectar ↔ honey — volume reduction during curing
Calculate volume and weight reduction as bees dehydrate raw floral nectar (80% moisture) down to cured honey (18% moisture).
Dog Age ↔ Human Age Equivalent
Calculate the human age equivalent of a dog based on their age and breed size category (small, medium, large, or giant), using modern veterinary curves.
One Rep Max (1RM) Calculator
Estimate your single repetition maximum lifting capacity (1RM) using major clinical lifting models (Epley, Brzycki, Lander).
Denim Weight Converter
Convert denim fabric weight between ounces per square yard (oz/yd²) and grams per square meter (gsm) with fabric weight classifications.
Swimming Pace & Yardage Converter
Convert swim splits and paces between per-100m, per-100 yards, and overall distances with custom pool sizes.
Coordinate converter — WGS84 ↔ local datum
Convert geographic coordinates between global WGS84 (GPS) and local datums, including UTM zone coordinate conversions.
Exposure time — emulsion type ↔ UV source ↔ seconds
Estimate photo-emulsion exposure durations for screen printing frames or solar plates using light distance calculations.
Chemical dilution — concentrate % ↔ water ↔ application rate
Calculate the required volume of liquid concentrate and water to achieve a specific target spray dilution percentage.
Tidal current ↔ drift
Calculate course to steer and speed over ground (or set and drift) to compensate for tidal current and wind leeway.